7.2 Mobility Management Procedures

Mobiilliitty Managemeentt Prroocceedduurreess

• Network Initiated MM common procedures:
• TMSI re-allocation procedure
• authentication procedure
• identification procedure
• MS-Initiated MM common procedures:
• IMSI detach procedure
• MM-specific procedures:
• normal location updating procedure
• periodic updating procedure
• IMSI attach procedure
• MM connection management procedures:
• establish, maintain and release a MM connection between the MS and
the Network

7.2.1 MM COMMON PROCEDURES.

MM common procedures relate to security functions and also includes MS network detach
procedures.
A MM common procedure can always be initiated whilst a RR connection exists. The
procedures belonging to this group are:
(a) Network-Initiated:
· TMSI re-allocation procedure
· Authentication procedure
· Identification procedure
· Abort procedure
The abort procedure is used only if an MM connection is being established or has already
been established i.e. not during MM specific procedures or during IMSI detach procedure.
(b) Initiated by the Mobile station:
· IMSI detach procedure

7.2.2 MM-SPECIFIC PROCEDURES.

MM specific procedures relate to location updating and also includes MS network attach
procedures.
A MM specific procedure can only be initiated if no other MM specific procedure is running
or no MM connection exists. The procedures belonging to this group are:
· Normal location updating procedure
· Periodic updating procedure
· IMSI attach procedure

7.2.3 MM CONNECTION MANAGEMENT PROCEDURES.

MM Connection management procedures enable the establishment, maintenance and release
of MM connections between the MS and the network (MSC), over which an entity of the
upper CM layer can exchange information with its peer.
A MM connection establishment can only be performed if no MM specific procedure is
running. More than one MM connection may be active at the same time.